Variable vane pumps, pilot operated, Type PV7

PV7 1/32

RE 10 515/05.00

Overview of contents

Contents Page

Features 1

Ordering details, preferred types 2

Symbols 3

Function, section 3 and 4

Technical data 5

Characteristic curves 6 to 11

Unit dimensions, single pump with controller 12

Dynamic behaviour of the pressure control 13

Controller programme:Symbols, characteristic curves, unit dimensions 14 to 17

Lock 18

Projecting guidelines for multiple pumps 19

Combination possibilities, multiple pumpordering details 20

Combination pump - unit dimensions 21 to 26

Motor-pump-drive unit, multiple pumpordering details, E-motor selection table 27

E-motor technical data and unit dimensions 28

Spare parts, seal kits, connection flanges 29

Projecting and commissioning guidelines 30

Installation guidelines 31

RE 10 515/05.00

Replaces: 05.97

Variable vane pumps,pilot operated, Type PV7

Nominal sizes 14 to 150Series 1XMaximum operating pressure 160 barMaximum flow 270 L/min

Type PV7/16…C…

H/A

1790

Features

PV7

– Variable displacement

– Low operating noise

– Long bearing life due to hydro-dynamically lubricated plainbearings

– Control facility for pressure and flow

– Low hysteresis

– Very short control times for on and off stroke

– Installation and connection dimensions to • VDMA 24 560 part 1• ISO 3019/2

Type P2V7/…+GF1/…

H/A/

D56

41/9

7

– Suitable for use with HETG and HEES fluids

– The standard PV7 pumps can be combined into numerousvariations of combination pumps

– The PV7 pumps can also be combined with internal andexternal gear pumps, axial piston and radial piston pumps

MPU

– Is supplied as a completely assembled unit

– Drive coupling and pump mounting bracket are not required

– Low operating noise due to the compact design

RE 10 515/05.00

Rexroth Hydraulics 2/32 PV7

Ordering details

SeriesSeries 10 to 19 = 1X(10 to 19: unchangedinstallation and connection dimensions)

Direction of rotationClockwise = R

Shaft endCylindrical drive shaft with through drive = E

Pipe connectionsStandard versionBS 10, 16, 25:Suction, pressure connection: pipe thread = 01BS 40:Suction connection: SAE flange connection,Pressure connection: pipe thread = 37BS 63, 100:Suction, pressure connection: SAE flange connection = 07

Directional valve 1)

WG = Normally closedWH = Normally open

Controller option0 = Standard3 = Lockable5 = With K plate6 = With Q plate7 = Lockable with K plate8 = Lockable with Q plate

Controller typeC = Pressure controllerD = Pressure controller for hydraulic remote pressure controlE = Pressure controller with electrical remote pressure control

(on request)N = Flow controllerW = Pressure controller with electrical 2-stage pressure adjustment

SealsM = NBR sealsK = FKM shaft seal ring

(other seals NBR)

PV7–1X / R E –

Build and nominal sizes Pipe connections Zero stroke pressure range

BS 10-NS 14 cm3 = 10-14 = 01 16 = up to 160 bar

BS 10-NS 20 cm3 = 10-20 = 01 10 = up to 100 bar

BS 16-NS 20 cm3 = 16-20 = 01 16 = up to 160 bar

BS 16-NS 30 cm3 = 16-30 = 01 08 = up to 80 bar

BS 25-NS 30 cm3 = 25-30 = 01 16 = up to 160 bar

BS 25-NS 45 cm3 = 25-45 = 01 08 = up to 80 bar

BS 40-NS 45 cm3 = 40-45 = 37 16 = up to 160 bar

BS 40-NS 71 cm3 = 40-71 = 37 08 = up to 80 bar

BS 63-NS 71 cm3 = 63-71 = 07 16 = up to 160 bar

BS 63-NS 94 cm3 = 63-94 = 07 08 = up to 80 bar

BS 100-NS 118 cm3 = 100-118 = 07 16 = up to 160 bar

BS 100-NS 150 cm3 = 100-150 = 07 08 = up to 80 bar

Preferred types (readily available)

Type Material No.PV7–1X/10-14RE01MC0-16 00580381PV7–1X/10-20RE01MC0-10 00534143PV7–1X/16-20RE01MC0-16 00580382PV7–1X/16-30RE01MC0-08 00533582PV7–1X/25-30RE01MC0-16 00580383PV7–1X/25-45RE01MC0-08 00534508PV7–1X/40-45RE37MC0-16 00580384PV7–1X/40-71RE37MC0-08 00535588PV7–1X/63-71RE07MC0-16 00506808PV7–1X/63-94RE07MC0-08 00560659PV7–1X/100-118RE07MC0-16 00506809PV7–1X/100-150RE07MC0-08 00561846

Type Material No.PV7–1X/10-14RE01MD0-16 00504653PV7–1X/10-20RE01MD0-16 00906584PV7–1X/16-20RE01MD0-16 00509274PV7–1X/16-30RE01MD0-08 00560658PV7–1X/25-30RE01MD0-16 00509506PV7–1X/25-45RE01MD0-08 00568833PV7–1X/40-45RE37MD0-16 00593330PV7–1X/40-71RE37MD0-08 00539886PV7–1X/63-71RE07MD0-16 00519094PV7–1X/63-94RE07MD0-08 00574560PV7–1X/100-118RE07MD0-16 00532770PV7–1X/100-150RE07MD0-08 00915470

Ordering example: PV7-1X/16 20RE01MC5-16PV7-1X/40-45RE37KD0-16

For pumps with settings to the customer‘s requirements:On the order please state the required setting data in clear text (e.g.qVmax = 20 L/min; pzero stroke = 70 bar). The pump will be set to therequired values and the operating noise optimised respectively.

Without any clear text information the flow and the zero strokepressure will be set to the relevant maximum values and the operatingnoise will be adjusted accordingly.1) Only for C5, D5 and W controllers

PV7 3/32 Rexroth Hydraulics

RE 10 515/05.00

P

S L

P

S L

P

S L

P

S L

M

1 9 2 9 6 10 8 7 3 4 11 12

L

P

S

X

X

X – X

Function, section

DesignThe PV7 hydraulic pumps are variable displacement vane pumps.

They mainly consist of the housing (1), rotor (2), vanes (3), stator ring(4), pressure controller (5) and adjustment screw (6).

The circular stator ring (4) is retained between the small control piston(10) and the large control piston (11). The third contact point of thering is the height adjustment screw (7).

The driven rotor (2) rotates inside the stator ring (4). The vanescontained within the rotor are pressed against the stator ring (4) bycentrifugal force.

AdjustmentAt the same time as the system pressure builds up, the rear surfaceof the small control piston (10) is connected to the system via achannel and is, therefore, always subjected to the system pressure.

When the pump is in its displacement position, the rear side of thelarge control piston (11) is also subjected to the system pressure viaa drilling in the control piston (14). The control piston (11) with thelarger surface area holds the stator ring (4) in its eccentric position.

The pumps displaces fluid at a pressure that is lower than the zerostroke pressure set on the pressure controller (5).

The controller piston (14) is held in a certain position by a spring (13).

Symbols

Single pump Double pump Motor-pump-drive unit

Suction and displacement processThe chambers (8) which are required for the transport of the fluid areformed by the vanes (3), the rotor (2), the stator ring (4) and thecontrol plates (9).

In order to ensure the pump function during commissioning, the statorring (4) is held in the eccentric position (displacement position) bythe spring (12) which is behind the large control piston (11).

Due to the rotation of the rotor (2), chambers (8) increase in size andat the same time, fill with fluid via a suction channel (S). When themaximum chamber volume is reached, the chambers (8) aredisconnected from the suction side. As the rotor (2) continues torotate, they are connected to the pressure side and become smallerand press oil into the system via the pressure channel (P).

RE 10 515/05.00


FP 14 5 13 FF

P

S10 4 11

FP 14 5 13 FF

P

S10 4 11

Function

Off-stroke

If force FP, resulting from the product of pressure x area, exceeds thecounter force FF of the spring, the controller piston (14) is movedagainst the spring (13). In this way, the chamber behind the largecontrol piston (11) is connected to tank and is thus unloaded.

The small control piston (10), which is constantly under systempressure, moves the stator ring (4) towards the centre position

On-stroke

When the pressure in the system falls below the set zerostroke pressure, the spring (13) moves the controller piston(14) back to its inital position.

The large control piston (11) is subjected to pressure andmoves the stator ring (4) into the eccentric position. Thepump is in its displacement position.

Tank

System pressure

Pilot pressure

Tank

System pressure

(virtually the zero position). The pump maintains the pressure, theflow decreases to zero, leakages are compensated for.

Power loss and heating of the fluid are kept at a low level.

The qV-p characteristic curve runs vertically and shifts in parallel ashigher pressures are set.


RE 10 515/05.00

Model Pilot operated variable displacment vane pump, adjustable

Type PV7

Mounting type 4-hole flange (to VDMA 24 560 part 1 and ISO 3019/2)

Pipe connections Threaded or SAE flange connection (dependent on build size)

Installation Optional, preferably horizontal (see page 21)

Shaft loading Radial and axial forces cannot be taken up

Direction of rotation Clockwise (viewed on shaft end)

Drive speed n min-1 900 to 1800

Build size BS 10 16 25 40 63 100

Nominal size Vg cm3 14 20 20 30 30 45 45 71 71 94 118 150

Drive power 1) Pmax kW 6.3 5.8 8.5 6.8 13.7 10.2 20.5 16.5 33 20.9 51.5 33

Permissible drive torque Tmax Nm 90 140 180 280 440 680

Max. flow 2) qV L/min 21 29 29 43.5 43.5 66 66 104 108 136 171 218

Leakage flow at zero stroke qVL L/min 2.7 1.9 4 2.5 5.3 3.2 6.5 4 8 5.3 11 7.3(with operating pressure at outlet = pmax)

Operating pressure, absolute– Inlet pmin-max bar 0.8 to 2.5

– Outlet 3) pmax bar 160 100 160 80 160 80 160 80 160 80 160 80

– Leakage outlet pmax bar 2

Pressure fluidfor use up to 160 bar (nominal pressure) HLP mineral oil to DIN 51 524 part 2

Special fluids 4)

(only with ordering code „…K…“)– Up to operating pressure pmax = 100 bar HETG and HEES pressure fluids to VDMA 24 568

– Up to operating pressure pmax = 80 bar HLP mineral oil to DIN 51 524 part 2 (from 10 mm2/s)HL mineral oil to DIN 51 524 part 1

Pressure fluid temperature range ϑ °C – 10 to + 70, take the permitted viscosity range into account!

Viscosity range ν mm2/s 16 to 160 at operating temperatureMax. 800 when starting under displacement conditionsMax. 200 when starting under zero stroke conditions

Degree of contamination Max. permissible degree of contamination of the pressure fluid isto NAS 1638 class 9. We, therefore, recommend a filter with aminimum retention rate of β10 = 100.

Weight (with pressure controller) m kg 12.5 17 21 30 37 56

Change of flow(with one turn of theadjustment screw and n = 1450 min-1) qV L/min 10 14 18 25 34 46

Technical data (for applications outside these paramters, please consult us!)

1) Measured at n = 1450 min-1; p = pmax; ν = 41 mm2/s2) The flow, due to manufacturing tolerances, can exceed the

stated values by approx. 6 %(measured at n = 1450 min-1; p = 10 bar; ν = 41 mm2/s).

3) The minimum settable pressure is approx. 20 bar.4) Further special fluids on request (e.g. for systems in the food

processing industry or for fire resistant fluids)!

RE 10 515/05.00


6462605856545250484644

0 20 40 60 80 100 120 140 160

P displacement

38

32

28

24

20

16

12

8

4

00 10 20 30 40 50 60 70 80 90 100

1

7

6

5

4

3

2

24

20

16

12

8

4

00 20 40 60 80 100 120 140 160

7

6

5

4

3

2

1

P displacement

P displacement

Pzero stroke

Pzero stroke

6462605856545250484644

0 20 40 60 80 100 120 140 160

Pdisplacement

P zero stroke

P zero stroke

Characteristic curves (measured at n = 1450 min-1, ν = 41 mm2/s and ϑ = 50 °C)

PV7/10-14

Operating pressure (output) in bar →

Flow

in L

/min

→

Driv

e po

wer

in k

W→

PV7/10-20


Flow

in L

/min

→

Driv

e po

wer

in k

W→

Noise pressure level measured in a anechoic chamber toDIN 45 635 part 26. Distance of microphone – pump = 1 m.

When ordering please take into consideration!

The pump adjustment is so carried out that the most favourable noisepressure level in relation to the largest zero stroke pressure is achieved.

It is, therefore, vital that the required zero stroke pressure is statedon an order when this differs from the nominal pressure.

Please take into account the projecting notes on page 30.

PV7/10-14 PV7/10-20


Noi

se p

ress

ure

leve

l in

dB(A

)→


Noi

se p

ress

ure

leve

l in

dB(A

)→

Drive RPM: n = 1450 min-1

n = 1000 min-1


RE 10 515/05.00

646260

58

56

54

5250

480 20 40 60 80 100 120 140 160

64

626058

56

5452

50

480 20 40 60 80 100 120 140 160

48

40

32

24

16

8

00 10 20 30 40 50 60 70 80

7

6

5

4

3

2

1

32

28

24

20

16

12

8

4

00 20 40 60 80 100 120 140 160

10

8

6

4

2

P displacement

Pdisplacement

Pzero stroke P zero stroke

P displacement

Pzero stroke

Pzero stroke

P displacement


PV7/16-20


Flow

in L

/min

→

Driv

e po

wer

in k

W→

PV7/16-30


Flow

in L

/min

→

Driv

e po

wer

in k

W→

Noise pressure level measured in an anechoic chamber toDIN 45 635 part 26. Distance of microphone – pump = 1 m.



It, is therefore, vital that the required zero stroke pressure is statedon an order when this differs from the nominal pressure.


PV7/16-20 PV7/16-30


Noi

se p

ress

ure

leve

l in

dB(A

) →


Noi

se p

ress

ure

leve

l in

dB(A

)→


n = 1000 min-1

RE 10 515/05.00


646260

58

56

54

5250

480 20 40 60 80 100 120 140 160

64

626058

56

5452

50

480 20 40 60 80 100 120 140 160

72

64

56

48

40

32

24

16

8

00 10 20 30 40 50 60 70 80

10

8

6

4

2

48

42

36

30

24

18

12

6

00 20 40 60 80 100 120 140 160

16

14

12

108

6

4

2

Pdisplacement

Pzero stroke

P displacement

P displacement

Pzero stroke

Pdisplacement

P zero stroke

P zero

stroke


PV7/25-30


Flow

in L

/min

→

Driv

e po

wer

in k

W→

PV7/25-45


Flow

in L

/min

→

Driv

e po

wer

in k

W→






PV7/25-30 PV7/25-45


Noi

se p

ress

ure

leve

l in

dB(A

)→


Noi

se p

ress

ure

leve

l in

dB(A

)→


n = 1000 min-1


RE 10 515/05.00

64

626058

0 20 40 60 80 100 120 140 160

70

6866

74

72

64

626058

56

540 20 40 60 80 100 120 140 160

70

6866

1201101009080706050403020100

80706050403020100

20

16

12

8

4

80

70

60

50

40

30

20

10

00 20 40 60 80 100 120 140 160

4

12

20

16

24

28

8

Pdisplacement

Pzero stroke

P displacement

Pzero stroke

P displacement

Pdisplacement

Pzero stroke

Pzero stroke


PV7/40-45


Flow

in L

/min

→

Driv

e po

wer

in k

W→

PV7/40-71


Flow

in L

/min

→

Driv

e po

wer

in k

W→






PV7/40-45 PV7/40-71


Noi

se p

ress

ure

leve

l in

dB(A

) →


Noi

se p

ress

ure

leve

l in

dB(A

)→


n = 1000 min-1

RE 10 515/05.00


64

626058

0 20 40 60 80 100 120 140 160

70

6866

74

7264

626058

56

54

0 20 40 60 80 100 120 140 160

6866

52

150

120

90

60

30

00 10 20 30 40 50 60 70 80

20

16

12

8

4

120

96

72

48

24

00 20 40 60 80 100 120 140 160

40

30

20

10

Pdisplacement

Pzero stroke

P displacement

Pdisplacement

Pzero stroke

P displacement

Pzero stroke

Pzero stroke


PV7/63-71


Flow

in L

/min

→

Driv

e po

wer

in k

W→

PV7/63-94


Flow

in L

/min

→

Driv

e po

wer

in k

W→

Noise pressure level measured in an ancechoic chamber toDIN 45 635 part 26. Distance of microphone – pump = 1 m.





PV7/63-71 PV7/63-94


Noi

se p

ress

ure

leve

l in

dB(A

)→


Noi

se p

ress

ure

leve

l in

dB(A

)→


n = 1000 min-1


RE 10 515/05.00

64

62

600 20 40 60 80 100 120 140 160

6866

70

76

7274

64

62

600 20 40 60 80 100 120 140 160

6866

70

76

7274

240

180

120

60

00 10 20 30 40 50 60 70 80

40

30

20

10

200

160

120

80

40

00 20 40 60 80 100 120 140 160

60

50

40

30

20

10

Pzero stroke

P displacement

P displacement

Pzero stroke

Pzero stroke

Pzero stroke

PdisplacementPdisplacement


PV7/100-118


Flow

in L

/min

→

Driv

e po

wer

in k

W→

PV7/100-150


Flow

in L

/min

→

Driv

e po

wer

in k

W→






PV7/100-118 PV7/100-150


Noi

se p

ress

ure

leve

l in

dB(A

) →


Noi

se p

ress

ure

leve

l in

dB(A

)→


n = 1000 min-1

RE 10 515/05.00


Ø D

5 h8

H7

Ø D6

L10L5

L6L8 L7

L1

D3

(L9)L2

L3L4

D1 1

H1

H2

H4

H5

H3

5 2D2B3

D7 H13

H6

B5 h9

B1B4 B6

B2

4

4717

6 7D1 13 D3

D4 ±0,2

B7

8

Unit dimensions (Dimensions in mm)

Single pump with C, D and N controller

1 Pressure port 1)

2 Suction port 2)

3 Leak-oil port

4 For controller for hydraulic remote controlOrdering code …D… and flow controllerOrdering code …N…, plug G 1/4, 12 deep

5 Flow adjustmentAdjustment guidelines:– Flow decreases when turned in a clockwise direction– and increases when turned in an anti-clockwise direction

(see page 5)– The set flow should not be less than 50 % of the maximum

value

6 Pressure controllerAdjustment guidelines:– The operating pressure increases when turned in a clockwise

direction– and decreases when turned in an anti-clockwise direction

Note: The zero stroke pressure changes by approx. 19 barfor 1 turn of the adjustment screw.

7 The space required to remove the lock cover (the pressure canonly be adjusted when the lock cover is removed)

8 Test point G 1/4, 12 deep

BS H1 H2 H3 H4 H5 H6 H7 D1 1) D2 2) D3 D4 ±0,2 Ø D5 h8 Ø D6 D7 H13

10 117 74 58 64 37 25 22.5 G 1/2 G 1 G 1/4 103 80 20 j6 9

16 118.5 81.5 68 72 40 26.5 28 G 3/4 G 1 1/4 G 3/8 125 100 25 j6 11

25 118.5 91.5 92 80 40 26.5 28 G 1 G 1 1/2 G 3/8 125 100 25 j6 11

40 118 105.5 89 94 45 26 35 G 1 SAE 1 1/2“ G 1/2 160 125 32 k6 14

63 118 111.5 105 100 47 26 35 SAE 1 1/4“ SAE 2“ G 1/2 160 125 32 k6 14

100 118 123.5 126 111 52 26 43 SAE 1 1/2“ SAE 2 1/2“ G 3/4 200 160 40 k6 18

BS L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 B1 B2 B3 B4 B5 h9 B6 B7

10 193 78.5 26 22 26 7 8 36 149 9 130 125 96 65 6 90 88

16 217 86 37 20 37 9 10 42 165 10 134.5 131 120 69 8 93 92

25 229 86 34 20 38 9 10 42 177 10 140.7 137 120 75 8 99 98

40 254.6 86 26.5 21.5 43 9 10 58 186.6 12 157.8 161 141.2 94 10 125 115.5

63 279 99 39 34.5 51 9 10 58 211 13 163.7 165 141.2 100 10 130 121

100 334 111 45.5 28.5 60.5 9 10 82 242 16 191.7 184.5 200 121 12 149.5 150

1) Build sizes 10, 16, 25 and 40Pipe thread „G…“ to ISO 228/1Build sizes 63 and 100 flange connection to SAE

2) Build sizes 10, 16 and 25Pipe thread „G…“ to ISO 228/1Build sizes 40, 63 and 100 flange connection to SAE


RE 10 515/05.00

700

300

1

2

4

3

Dynamic charateristics of the pressure control

Test set-up1 Directional valve (switching time 30 ms)

2 Throttle for adjusting the pressure when the pump is displacing

3 Hydraulic pump

4 Pressure measurement point

Off stroke

qV displacement → qV zero stroke

On stroke

qV zero stroke → qV displacement

Ope

ratin

g pr

essu

re p

→

Ope

ratin

g pr

essu

re p

→

Pres

sure

pea

k

10 b

ar

t off

t2 on

t1 on

Time t → Time t →

(approx. 90 % flow)

Off-stroke times in ms (average values) On-stroke times in ms (average values)

Control times qV displacement → qV zero stroke qV zero stroke → qV displacement

20 → 160 bar 20 → 80 bar 20 → 40 bar 160 → 130 bar 80 → 60 bar 40 → 30 bar

toff pmax 1) toff pmax toff pmax t1 on t2 on t1 on t2 on t1 on t2 on

10-14 100 180 – – 150 80 60 80 – – 60 80

10-20 – – 100 130 150 100 – – 60 80 50 100

16-20 100 200 – – 120 100 50 80 – – 50 90

16-30 – – 100 140 150 110 – – 50 80 50 100

25-30 100 220 – – 120 120 80 100 – – 70 100

25-45 – – 100 150 120 120 – – 80 100 80 130

40-45 100 240 – – 120 140 70 100 – – 60 100

40-71 – – 100 180 120 150 – – 80 100 80 140

63-71 150 220 2) – – 150 180 80 120 – – 100 140

63-94 – – 200 150 2) 220 150 – – 120 150 130 210

100-118 200 220 2) – – 250 200 100 150 – – 150 250

100-150 – – 250 150 2) 280 150 – – 150 200 180 280

Build

and

nom

inal

size

s

1) Permissible pressure peaks 2) Pressure relief valve is required to limit pressure peaks

RE 10 515/05.00


qV

p

qV

p

P

1

SL

P1

SLT

2

Controller programme

C controller

Pressure controllerWith mechanical pressure adjustment ordering code …C0-…(for the lockable version the ordering code is …C3-…)

Symbol

Ordering example:1 Pump: PV7-1X/16-20RE01MC0-16

or PV7-1X/63-94RE07MC0-08

D controller

Pressure controllerWith hydraulic remote pressure adjustment ordering code …D0-…(for the lockable version the ordering code is …D3-…)

Symbol

Ordering example:

1 Pump: PV7-1X/25-45RE01MD0-08

2 Optional pressure relief valve; must be orderedseparately

The remote control line between the controller andpressure relief valve (2) should not be longer than2 meters.

Note: The zero stroke pressure results from thepressures set at the pump and pressure relief valve.


RE 10 515/05.00

qV

p

P1

SL

T

2

qV

p

P

1

SL

T

X

2 3


E controller (on request)Pressure controllerWith electrical remote pressure adjustment ordering code …E0-…

Symbol

Ordering example:

1 Pump: PV7-1X/16-20RE01ME0-16

2 Pressure relief valve

N controller

Flow controllerWith mechanical flow adjustment ordering code …N0-…(for the lockable version the ordering code is …N3-…)

Symbol

Ordering example:1 Pump: PV7-1X/16-20RE01MN0-16

or PV7-1X/63-94RE07MN3-08

2 Optional orifice (e.g. throttle to RE 27 219)

3 Optional pressure relief valve(this valve is necessary as, in this case, there is nocontrol to zero stroke)

Items 2 and 3 must be ordered separately.

The control line between the controller connection „X“and the orifice should not be longer than 1.5 m.

RE 10 515/05.00


qV

p

P1

SL

T

2

B1

P

S

H1

H2

G1/4

T


W controller

Pressure controllerWith electrically switchable 2-stage pressure adjustmentordering code …W0-…Symbol

Ordering example:1 Pump: PV7-1X/16-20RE01MW0-16

2.1 3/2-way caratridge valve to RE 23 140 optionally normallyopen or normally closed

2.2 Pressure relief valve to RE 25 710


W controller

For further unit dimensions see page 12.

Build size B1 H1 H2

10 189 187.5 77.5

16 192 189 79

25 198 189 79

40 224 188.5 78.5

63 229 188.5 78.5

100 248.5 188.5 78.5


RE 10 515/05.00

qV

p

B7

B2

P

S

H1

P

SL

3 2 1


Hydraulic start-up assistance (K-plate)Sandwich plateWith an unloading valve for start-up at the lowest zero strokepressure.Zero stroke pressure is approx. 20 bar (application dependent)Ordering code …5-…(for the lockable version the ordering code is …7-…)

Note: Not suitable for a 2-stage control!

SymbolOrdering example:1 Pump: PV7-1X/40-71RE37MC5-08

2 3/2-cartridge valve to RE 23 140optionally normally closed(Type: 3WE 4 C1XKAG24NK4) ornormally open (Type: 3WE 4 U1XK/AG24NK4)

3 Optionally C, D or N controller


K-plate


Build size B2 B7 H1

10 204.5 143.5 117

16 207.5 146.5 118

25 214 153 118

40 240 179 118

63 244.5 183.5 118

100 264 203 118

RE 10 515/05.00


qV

p

B2

H1

S

P

P

SL

Y

4 2

3

1

5


Flow-pressure controller (Q-plate)Sandwich plateFor connecting a flow controller with a pressure controlled pump.Fitted with a standard flow controllerOrdering code …6-…(For the lockable version the ordering code is …8-…)

Symbol

Ordering example:1 Pump: PV7-1X/63-712RE07MC6-16

2 Sandwich plate for connecting the pressurecontroller and flow controller functions

3 Flow controller as described on page 14

4 Pressure controller optionally type C, D, E orW as described on pages 14 and 15

5 Optional orifice (e.g. throttle to RE 27 219),must be ordered separately

The control line between the controller connection„Y“ and the orifice should not be longer than1.5 m.


Q-plate


Build size B2 H1

10 173.5 117

16 176.5 118.5

25 182.5 118.5

40 208.5 118

63 213.5 118

100 233 118


RE 10 515/05.00

Tmax

T1

Tab2

T2

Tab1Tmax

T1

Tab maxfrom max

from 1

from 2

Lock

Material No.: 00844598This lock is fitted to all pumps which have the controller option …3…,…7… or …8….

Functional descriptionAfter unlocking (after turning the key clockwise) the entire lock covercan be removed from the controller. The controller adjuster is thenaccessible.

To lock, the lock the cover is placed over the controller adjuster andthen pressed home, the lock cylinder is pressed down and the keyturned anti-clockwise.

A lock can be fitted to a standard pump by,

– Unscrewing the domed nut from the controller adjuster.

– Fitting the nut which contains the lock.

– Fitting the lock cover as described in the functional description.

Project guidelines for combination pumps

– The PV7 pumps are, as standard, capable of being combined.Each pump is fitted with a splined second shaft end.

– When operating the PV7 pump, as a fixed displacement unit,the fixed displacement unit must be the rear pump.

– The general technical data is the same as with the single pumps(see page 5).

– The pump with the higher load (pressure x flow) should be thefirst pump stage.

∆p • V • 0,0159

ηhydr.-mech.

160 • 30 • 0,0159

0,85

Calculation example:

V = Displacement in cm3

ηhydr.-mech. = Hydraulic-mechanical efficiency

T = Torque in Nm

∆p = Pressure in bar

PV7 Max. permissible

Build size Drive torque Tmax Output torque Tfrom max

10 90 45

16 140 70

25 180 90

40 280 140

63 440 220

100 680 340

– With the combination of several pumps, the torques producedcan reach excessively high values.The sum of the torques must not exceed the permissible values(see table)

– Combination parts have to be a separate item on an order.

– The necessary seals and screws are included in the combinationkit.

Single pump Combination pump

1st pump2nd pump

Combination pump: P2V7/25-30… + V7/25-30…

Required max. pressure: pn = 160 bar

T = (Nm)

T1,2 = (Nm)

T1,2 = 90 Nm ≤ Tfrom max

T = T1 + T2 = 180 Nm ≤ Tmax

The pump combination can be operated on the basis of thecalculated data.

RE 10 515/05.00


Combination pump possibilities

All of the type PV7 pumps are capable of being combined. Pumpswith an E-shaft have a through drive.

The possible pump combinations, the material nos. and the requiredcombination kits are contained with the following table.

Rear pump Front pumpPV7-1X/10 PV7-1X/16/25 PV7-1X/40/63 PV7-1X/100

PV7-1X/06-…RA01M… 00540811 00540812 00540814 00543034

PV7-1X/10-…RE01M… 00540811 00540812 00540814 00543034

PV7-1X/16-…RE01M… – 00540813 00540815 00543035

PV7-2X/20-…RA01M… – 00540813 00540815 00543035

PV7-1X/25-…RE01M… – 00540813 00540815 00543035

PV7-1X/40-…RE37M… – – 00540816 00543036

PV7-1X/63-…RE07M… – – 00540816 00543036

PV7-1X/100-…RE07M… – – – 00543037

PGF1-2X/…RH01VU2 00857584 00857585 – –

PGF2-2X/…RJ…VU2 00541209 00541210 00541203 00544959

PGF3-3X/…RJ…VU2 – 00888267 00880623 00880624

PGP2-2X/…RJ20VU2 00541209 00541210 – 00544959

PGP3-3X/…RJ…VU2 – 00888267 00880623 00880624

PGH2-2X/…RR…VU2 00541209 00541210 – 00544959

PGH3-2X/…RR…VU2 00541209 00541210 – 00544959

PGH4-2X/…RR…VU2 – – – 00876576

PVV/Q1/2-1X/…RJ15… – 00888267 00880623 00880624

PVV/Q4/5-1X/…RJ15… – – – 00875983

1PF2G2-4X/…RR20MR 00541209 00541210 – 00544959

1PF1R4-1X/0,40…2,00-…WG… 00541204 00541205 – –

1PF1R4-1X/1,60…20,00-…RG… 00541214 – – –

1PF1R4-1X/1,60…20,00-…RA… – 00541207 00541208 00543767

A10VSO10…U 00541209 00541210 00541203 00544959

A10VSO18…U 00541209 00541210 00541203 00544959

A10VO28…S – 00888267 00880623 00880624

A10VO45…S – – – 00875983

Ordering details for combination pumps

Double = P2

First pumpseries

First pump nominal size

First pump controller

Second pump series

Second pump nominal size

Second pump controller

First pumpmounting

flange

Second pumpconnection port

Second pumpshaft version

(if required) 1)

First pump connection port

First pump shaft version

Direction of rotation

P2 V7 / 100-150 C0 + V7 / 100-150 C0 R E 07 + 07 E4

1) For PGF2 and PGF3

Triple and quadruple pumps are coded analogue!


RE 10 515/05.00

Ø D2H

1

4 x D4

B1JS9

L6 (L1 + L9)L4

L1

L2L3

L5S

P

Ø D

1Ø D

3

Pump combinations P2V7… + V7/… (Dimensions in mm)

1st pump BS 2nd pump BS L1 L2 L3 ØD1 ØD2 ØD3 D4 H1 B1 L4 L5 L6

10 06 182 50 8 80 103 20 M8 22.8 6 199 202.5 283

10 182 50 8 80 103 20 M8 22.8 6 208 208 331

16 06 200 55 8 80 103 20 M8 22.8 6 217 220.5 301

10 200 55 8 80 103 20 M8 22.8 6 226 226 349

16 208 63 10 100 125 25 M10 28.3 8 245 245 373

25 06 212 55 8 80 103 20 M8 22.8 6 229 232.5 313

10 212 55 8 80 103 20 M8 22.8 6 238 238 361

16 220 63 10 100 125 25 M10 28.3 8 257 257 385

20 220 63 10 100 125 25 M10 28.3 8 245 245 354

25 220 63 10 100 125 25 M10 28.3 8 254 258 397

40 06 221.6 55 8 80 103 20 M8 22.8 6 238.6 242.1 322.6

10 221.6 55 8 80 103 20 M8 22.8 6 247.6 247.6 370.6

16 229.6 63 10 100 125 25 M10 28.3 8 266.6 266.6 394.6

20 229.6 63 10 100 125 25 M10 28.3 8 254.6 254.6 363.6

25 229.6 63 10 100 125 25 M10 28.3 8 263.6 267.6 406.6

40 246.6 80 10 125 160 32 M12 35.3 10 273.1 289.6 433.2

63 06 244.5 55 8 80 103 20 M8 22.8 6 261.5 265 345.5

10 244.5 55 8 80 103 20 M8 22.8 6 270.5 270.5 393.5

16 252.5 63 10 100 125 25 M10 28.3 8 289.5 289.5 417.5

20 252.5 63 10 100 125 25 M10 28.3 8 277.5 277.5 386.5

25 252.5 63 10 100 125 25 M10 28.3 8 286.5 290.5 429.5

40 269.5 80 10 125 160 32 M12 35.3 10 296 312.5 456.1

63 269.5 80 10 125 160 32 M12 35.3 10 308.5 320.5 480.5

100 06 276.5 55 8 80 103 20 M8 22.8 6 293.5 297 277.5

10 276.5 55 8 80 103 20 M8 22.8 6 302.5 302.5 425.5

16 284.5 63 10 100 125 25 M10 28.3 8 321.5 321.5 449.5

20 284.5 63 10 100 125 25 M10 28.3 8 309.5 309.5 418.5

25 284.5 63 10 100 125 25 M10 28.3 8 318.5 322.5 461.5

40 301.5 80 10 125 160 32 M12 35.3 10 328 344.5 488.1

63 301.5 80 10 125 160 32 M12 35.3 10 340.5 352.5 515.5

100 321.5 100 10 160 200 40 M16 47.3 12 367 382 563.5

RE 10 515/05.00


M10

; 13

130

53,1

+0,

3 106,

5+0,

2

16 /

32 D

P; 9

T

S

P

L1

70 L3

10

L2

Ø 8

2,55

Zahn

nabe

5/8

“Sp

lined

hub

5/8

“

Pump combinations P2V7… + PGF2 / PGP2 / PGH2 / PGH3 / G2 / A10SVO10;18 (Dimensions in mm)

PV7 build size L1 L2

10 168 36

16 192 47

25 204 47

40 213.6 47

63 236.5 47

100 268.5 47

PGF2 / PGP2 nom. size L3 L4

006 65 116

008 67 119.5

011 69.5 125

013 72 130

016 74.5 135

019 77.5 141

022 80.5 147

PGH2 nom. size L3 L4

003 51 102.5

005 53.5 107.5

006 55.5 112.5

008 57 116

PGH3 nom. size L3 L4

011 60 121.5

013 62.5 126.5

016 65 131.5

G2-4X nom. size L3 L4

004 42.75 88.5

005 42 93.5

008 45.75 93.5

011 48 98

014 50 102

016 51.5 105

019 53.5 109

022 58 118

A10VSO nom. size L3 L4

010 148 1) 164; 179 2)

018 145 195

1) Axial connection port2) Controller dependent (see RE 92 713)


RE 10 515/05.00

M12

212

146+

0,2

S

P

L1

70 L3

10

L2

Ø 1

01,6

L4

45°

Pump combinations P2V7… + PGF3 / PGP3 / PVV1 / PVV2 / PGH4 / A10VO28 (Dimensions in mm)

PV7 build size L1

16 145

25 157

40 167

63 189.5

100 221.5

PGF3 / PGP3 nom. size L2 L3; L4

020 144.5 79.5

022 146.5 80.5

025 150.5 82.5

032 159.5 87

040 169.5 92

050 182.5 98.5

PVV. L2 L3 L4

PVV1 156 133 63.5

PVV2 163 38.1 120.6

PGH4 nom. size L2 L3; L4

020 147 70.5

025 152 73

032 159 76.5

040 166 80

050 176 85

063 190 92

080 204 99

100 224 109

A10VO nom. size L2 L3 L4

028 194 164.5 164.5

RE 10 515/05.00


212

181+

0,2

S

P

221,5

70 L1

10+0,5

L3

Ø 1

27

L2

45°

Pump combinations P2V7/100… + PVV4 / PVV5 / A10VO45 (Dimensions in mm)

L1 L2 L3

PVV4 38.1 125.5 186

PVV5 42.9 153 216

A10VO45 184 184 219


RE 10 515/05.00

M10

; 13

130

53,1

+0,

3 106,

5+0,

213,8

+0,

1

S

P

L1

L2 L3

7

L4

Ø 8

2,55

+0,

05+

0,01

Ø 1

2F7

4 x 4,6H13

Ø 63 +0,05+0,01

DIN 5481

L1

L2

8

L4

Ø 5

0+

0,05

+0,

01

3038

Pump combinations P2V7… + GF1… (Dimensions in mm)

GF1 nom. size L3 L4

1.7 48.6 86

2.2 48.6 86

2.8 49.7 88.6

3.2 50.5 89.9

4.1 52.4 93.6

5.0 54.2 97.3

PV7 build size L1 L2

10 168 36

16 192 47

25 204 47

Pump combinations P2V7… + R4-Mini (Dimensions in mm)

PV7 build size L1 L2 L4

10 178 46 247

16 208 63 277

25 220 63 289

PV7 build size L1 L2 L4

40 229.6 63 298.6

63 252.5 63 321.5

100 284.5 63 353.5

10 x 12 spline

RE 10 515/05.00


4 x 9H13

DIN 5481

Ø 85 +0,05+0,01

L5 S

L6L4

193

617 P

Ø 6

3+0,

05+

0,01

4 x 9H13

Ø 85 +0,05+0,01

L5 S

L6L4

L1

7 PØ

63+

0,05

+0,

01

Ø 2

5F7

8JS9

28,3

+0,

2

60

Pump combinations P2V7… + R4-Standard (Dimensions in mm)

PV7/16… to PV7/100… + R4-Standard

PV7 build size L1 L4 L5 L6

3/5 pistons 10 pistons 3/5 pistons 10 pistons 3/5 pistons 10 pistons

16 205 243.5 243.5 243.5 252.5 291 324.5

25 217 255.5 255.5 255.5 264.5 303 336.5

40 226.6 265.1 265.1 265.1 274.1 312.6 346.1

63 249.5 288 288 288 297 335.5 369

100 281.5 320 320 320 329 367.5 401

PV7/10… + R4-Standard

Piston L4 L5 L6

3; 5 231.5 231.5 279

10 231.5 240.5 312.5

10 x 12 spline


RE 10 515/05.00

Motor-pump drive unit

The electric motor and vane pump are connected without a couplingand pump mounting bracket. This results in a very cost effective andcompact unit.

The motor design which has a hollow shaft with key-way makes itpossible to utilise standard pumps.

Ordering details

No. ofpumps fitted

First pump series

First pump nominal size

First pump controller

Second pump series 1)

Second pump nominal size 1)

Second pump controller 1)

Consecutiveidentification letter

(if required)

E-motor power

E-motor frame size

MPU 2 – V7/ 10-14 C0 + V7/ 10-14 C0– 90LX – 3,60 A

Note with reference to the EC machinery guidelines 89/392 EWG, annex II, section B:The UPP drive units are manufactured in accordance to the harmonisedstandards EN 982, EN 983, DIN EN 292 and DIN EN 60 204-1.

Commissioning is not permitted until it has been proven that themachine into which the UPP assembly is to be fitted complies withthe requirements stated in the EC guidelines.

E-motor frame size 90SX 90L 90LX

Power in KW 0.75 2.20 3.60

Pump build size Material No. of the available motor variants

PV7/10 00892349 00892361 00892369

Selection table:

The nominal powers stated in the above table are valid for continuousoperation to VDE 0530 at a frequency of 50 Hz, and a cooling mediumtemperature of 40 °C at a height up to 1000 m above sea level.

Ordering example: MPU1-V7/10-14CO-90L-2,201) If required

E-motor

E-motor frame size 90SX 90L 90LX

Power in KW 0.75 2.20 3.60

PV7/10-14C0 00979226 00979227 00979228

PV7/10-20C0 – 00979225 00977693

MPU unit

RE 10 515/05.00


78,5

26

22

Ø17

5

26

149 b 125

a

P

125 130

Ø10

140

165

217

90

7458

Motor type Surface cooled, 3-phase withsquirrel cage

Frame type B3 with hollow shaft and mounting flange

Electrical power connection Pg-fittings and earth in the terminal box

Insulation Insulation class F

Protection IP55 to VDE 0530

No. of poles 4

Voltage to DIN IEC 38 V ∆230 / Y400 at 50 Hz; ∆266 / Y460 at 60 Hz

Frequency Hz 50 or 60

RPM At 50 Hz min-1 1500

At 60 Hz min-1 1800

Installation Optional

Technical data: E-motor (for applications outside these parameters, please consult us!)

Operational switching of the AC motors

Type of Operating For direct For Y ∆winding voltage starting starting

volt volt volt volt

220…240 220…240 ∆50 Hz 230 ∆ / 400 Y 220…240 ∆

380…420 380…420 Y

Motors with a winding for 50 Hz and connected to a60 Hz supply

Conversion factor at 60 Hz

Nom. RPM Nom. power

nnom Pnom

1.2 1.0

1.2 1.0

1.2 1.15

1.2 1.2

Unit dimensions: MPU (Dimensions in mm)

Motor type a c

90S 269 16-106

90L 283 16-131

90X 315 16-151


RE 10 515/05.00

L5

L2

L1 L3

L2 B1

B2L4

B3 B4D3

Ø D

1

Ø D

2

30°

SAE connecting flanges, max. operating pressure 210 bar (3000 PSI) (Dimensions in mm)

Fixingscrews

NBR seals NBR seals

With welded connections to AB-E 22-15 With threaded connections

The Material No. includes the flange, O-ring and fixing screws.

Pipe threads „G“ to ISO 228/1

Material No. For pump typeNS Sealing material Welded connection Threaded connection Suction port Pressure port

1 1/4“ NBR 00012946 0014153 – PV7/63-…1 1/2“ NBR 00013501 00014827 PV7/40-… PV7/100-…

2“ NBR 00013502 00014829 PV7/63-… –2 1/2“ NBR 00013503 00024205 PV7/100-… –

NS B1 B2 B3 B4 ØD1 ØD2 D3 L1 L2 L3 L4 L5 Fixing screws1 1/4“ 58.7 79 30.2 68 38 30 G 1 1/4 41 21 18 22 42 M10-8.81 1/2“ 69.9 95 35.7 76 42 36 G 1 1/2 44 25 18 24 57 M12-8.8

2“ 77.8 102 42.9 90 61 49 G 2 45 25 18 26 46 M12-8.82 1/2“ 88.9 114 50.8 104 76 62 G 2 1/2 50 25 18 30 50 M12-8.8

RE 10 515/05.00


!

!

Projecting guidelines

Extensive guidelines and suggestions can be found in the HydraulicTrainer, volume 3, RE 00 281, „Projecting and designing hydraulicsystems“.

When applying vane pumps, we recommend that the following guidelinesare particularly to be taken into account:

– Technical dataAll of the technical data stated are dependent on themanufacturing tolerances and are valid for certain conditions.Please take into account that due to this a small spread is possibleand a change in the conditions (e.g. viscosity) can lead to thetechnical data being affected.

– Characteristic curvesCharacteristic curves for flow and taken-up power.Please take the maximum possible application data into accountwhen selecting the electric motor.

– Noise/noise pressure levelThe values stated on pages 6 to 11 for the noise pressure levelhave been measured in accordance to DIN 45 635 part 26.

This means that only the noise emission from the pump is shown.External influences (such as place of installation, pipework, etc.)are eliminated. The values stated always refer to one pump.

If, for example, two pumps of the same size with the same loadingare in use, then the noise level increases to the following formula

LΣ = 10 lg (100,1•L1 + 100,1•L2)LΣ = total level

L1 … Li = noise pressure level of a single pump

Example: PV7/16 + PV7/16

p = 120 bar

L1 = 56 dB(A)

L2 = 56 dB(A)

LΣ = 10 log (100,1•56 + 100,1•56)

= 59,01 dB(A)

Attention: The power unit design and theinfluences at the pumps final place of use resultin the fact, in general, that the noise pressurelevel is 5 to 10 dB(A) higher than the value of thepump on its own.

Leakage fluid

Part of the frictional heat is dissipated via the leakage fluid from thepump. The leakage fluid should be returned directly to the oil reservoirwith a low pipe back pressure. The distance between the leak lineand the suction line must be large enough so that the returningleakage fluid can not be directly taken up by the pump. The averageleakage flow via the external port is shown on page 5. These valuesare not to be used for dimensioning the reservoir. For the selectionof the reservoir size, the zero stroke power is the relevant value (seepages 6 to 11).

Leakage fluid coolerThe values stated on page 5 for the external leakage fluid are averagevalues for continuous operation.

When the pump goes off-stroke the leakage fluid flow is brieflyincreased by the control oil flow. Reductions in cross-section, longleak lines and also a leakage fluid cooler can lead to unpermissiblyhigh pressure peaks. By means of suitable measures, e.g. a by-passcheck valve, it must be ensured that the leakage fluid pressure(pmax = 2 bar) does not exceed the permissible values. There isotherwise the danger of the shaft seal being damaged.

Commissioning

Air bleeding

– All PV7 vane pumps are self priming.

– Before commissioning the pump must be bled to protect it from damage.

– When commissioning for the first time, we recommend that the housingis filled via the leakage connection. Take into account the filter rating!This increases the service life and prevents wear in the case ofunfavourabe installation conditions

– If the pump does not supply fluid free of bubbles after approx. 20seconds then the system should be rechecked. After reaching theoperating values check the pipe connections for leaks. Check theoperating temperature.

Commissioning

– Check to see whether the system has been carefully and cleanlyassembled.

– Take into account the direction of rotation arrows on the pump andmotor.

– Start up the pump without load and permit it to supply fluid for a fewseconds without pressure so that adequate lubrication is ensured.

– Under no circumstances run the pump without fluid!

Important guidelines

– Adjustment, service and maintenance of the pump must only becarried out by authorised, trained and instructed personnel!

– Only use original Mannesmann Rexroth spare parts!

– The pump must only be operated with the permitted data.

– The pump must only be used when it is in a good condition!

– When carrying out any work on the pump (e.g. removing andrefitting) the system must be depressurised and isolated fromthe mains supply!

– Conversions and modifications done by yourselves which affectthe safety and function are not permitted!

– Protection features (e.g. coupling guard) are to be fitted!

– Protection features which are present must not be removed!

– The general safety and accident prevention regualtions must beadhered too!


RE 10 515/05.00

45°

!

!

Installation guidelines

Pipework suggestion (dimensions in mm)

Drive: Variant 1

The UPP drive unit (is supplied complete by ourselves)electric motor and pump

– Very short design

– Cost effective solution (coupling and pump mounting bracketare not required)

– No assembly necessary

Drive: Variant 2

Electric motor + pump mounting bracket + coupling + pump

Fluid reservoir– Match the usable volume of the reservoir to suit the operating

conditions.

Attention! – The permissible fluid temperature must not beexceeded→ A cooler may have to be provided!

Pipes and connections

– Cut off at an angle of 45°.

– Remove protective plugs from the pump.

– We recommend the use of seamless presision steel pipes toDIN 2391 and removable pipe couplings.

– Match the inside diameter of the pipe to the connections.

– Carefully clean pipe and fittings before assembly – minimumdistance to the bottom of the reservoir is 120 mm.

– Lay the leakage line so that the pump cannot drain!

– Do not pipe with pump without a controller!

– Leak and return line fluid must under no circumstances beimmediately taken up by the pump!

Filter

– Use return and pressure filters where possible.(suction filter only in conjunction with an under pressure switch/clogging indicator)

Pressure fluid

– Please take into account our specifications stated in cataloguesheet RE 07 075.

– We recommend brand name pressure fluids.

– Different types of pressure fluids must not be mixed asdecomposition and a reduction in lubricity may result. Take themanufacturere‘s specifications into account!

– Depending on the operating conditions the pressure fluid mustbe changed at regular intervals. It is necessary to clean the fluidreservoir of any residues.

Installation

– Horizontal is preferred

V1

B5

B3

Attention! – Radial and axial forces which act on the pumpdrive shaft are not permitted!→ Motor and pump must be exactly aligned!→ Use a flexible drive coupling m

in 1

00

min

50

min

120

Suction line

Leak line

min 200

All rights reserved – Subject to revision 32/32 PV7

RE 10 515/05.00

Mannesmann Rexroth AGRexroth Hydraulics

D-97813 Lohr am MainJahnstraße 3-5 • D-97816 Lohr am MainTelefon 0 93 52 / 18-0Telefax 0 93 52 / 18-23 58 • Telex 6 89 418-0eMail [email protected] www.rexroth.com

The specified data is for product descriptionpurposes only and may not be deemed to beguaranteed unless expressly confirmed in thecontract.

Mannesmann Rexroth Limited

Cromwell Road, St Neots,Cambs, PE19 2ESTel: 0 14 80/22 32 56Fax: 0 14 80/21 90 52E-mail: [email protected]

Notes

Documents

Variable vane pumps, pilot operated, Type PV7